Means for dry icing



Feb. 1e, 1931. l R, H l 2,011,303

MEANS FOR DRY IGING Filed April 4, 1955 INVENTOR sMuuiliirnmrmu nvAvAvnAnvAvnAvAvAvAvAvAvAvA BY w* ,.xvAvAvAvAvnmvvnnmvAvAvAvA Mm? WV 0"10 ATTORNEY 9 Patented Feb. 16, 1937 UNITED -STATES MEANS FOR DRY ICINGReuben Hill, Detroit, Mich., assigner to-Albert J. Smith, `RichmondHill, Long Island, N. Y.

Application April 4,

2 Claims.

, Carbon dioxide ice (commonly called dry ice) is now frequently usedfor rerigerating purposes and for keeping refrigeratable products incold condition. The application of such` carbon dioxide ice to suchproducts for'such purposes is commonly called dry icing and suchterminology will be hereinafter used with reference to such methods ofutilizing carbon dioxide ice.

In previous methods of dry icing, individual cartons of ice cream orsimilar reirgeratable material, it has been the practice to place apiece of cut out dry ice loosely in an outer carton land over such pieceof dry ice to place a carton of ice cream and on the top of this icecream carton to place more dry ice and then close the carton. This typeof container and method of dry icing of ice cream cartons has been foundobjectionable in several respects. The ice cream in the ends of thecarton received excessive cold from the dry ice Aand `became extremelyhard. The ice cream in the center of the carton, due to rapid heattransfer thereinto from the sides was relatively soft. Furthermore, thedry ice at the ends of the carton received considerable 5 amounts ofheat through the end Walls of the container. Furthermore, considerablequantities of dry ice were required for former methods of dispensing,since the quantity placed in the carton was left to the discretion ofthe attendant and] 30 was often incorrectly measured.

The present invention has for its object the provision of a novel cartonfor dn' icing and the provision of a novel method or dry icing whichwill minimize and obviate the foregoing 35 difllculties.

Another object or the present invention resides in the provision of anovel carton and method of dry icing which will substantially equalize.

the temperature throughout the brick of ice cream 0 or otherrefrigeratable commodity and which will furthermore maintain a requiredtemperature for a prescribed length oi time with a relatively smalleramount of dry ice.

A further object` of the present invention resides in the provision of anovel carton and method of packing which will permit the utilization oi'a pre-formed cake of dry ice of denite sise and shape to provide coolingfor a deflnite cooling period.

Further and other objects of the present invention will be hereinafterset forth in the accompanying specification and claims and shown in thedrawing which shows by way of illustration a preferred embodiment andthe principle -55 thereof and what I now consider to be the best 1935,serial No. 14,631

mode in which I have contemplated of applying that principle. Otherembodiments of the invention employing the same or equivalent principlemay be used and structural changes made as desired by thosel skilled inthe art without departing from the present invention and within thespirit of the appended claims.

In the drawingz' Figure 1 shows the complete package with the outercarton and with the interior parts shown in dotted lines;

Fig. 2' is a detail view showing one of the constituent parts of thecontainer showing a retainer for a. dry ice cake with the dry ice cakein such retainer; and

Fig. 3 shows the package prior to being placed in the outer carton. Thisview is taken on line 3-3 of Fig. l.

In more detail inthe drawing, I0 designates a` rectangular piece ofcommercial corrugated packing board. I I is a similar rectangular pieceyof board which is provided with a perforation extending whollytherethrough as shown 'at I2. This perforation at I2 is of such size asto receive a cake of dry ice I3. The cake of dry ice may be providedwith a paper ring I4 at its periphery to facilitate handling.

In practice, the two elements I0 and II may be secured together to forma unitary assembly in any desired manner as by gluing the sameor by wirestapling as indicated at I5.

When it is desired to dry ice a commercial package of ice cream or likerefrigeratable commodity, the dispenser takes the carton of ice cream I6from the refrigerator. He then takes two cakes of dry ice I3 and placeseach cake in the recess in veach board assembly. Thereafter the twoassemblies are placed in contact with carton I8 in such a manner thatthe dry ice cakes I3 are in contact with the carton I6. Preferably thedry ice cakes contact the sides of the package I6 as shown in Fig. 3.They may, however, 'be placed at the ends, but the side relation ispreferable." For multiple packing the assemblies may be used at theouter ends and a dry ice cake may be placed between the separate icecream cartons I6. Thereafter these parts, in-

' cluding the two assemblies and the carton, are loosely wrapped infour-ply newsprint. The newsprint 'is indicated at I1 in Fig. 3. Thisloosely wrapped package is then placed in the outer customer orcarryingcarton I8'.

By the use of the foregoing container and method of packing thereis-direct heat conductivity` between the face of the dry ice cake andthe side or the ice cream carton i8. The gases o! sublimation from thecakes of dry ice also pass through the corrugations of the elements ilinto the space i9 which is within the wrapping l1. 'Ihese gases act assupplemental heatrinsulators and also cool the intermediate parts of thecarton. The outer elements i0 of each assembly act as insulators toprevent direct outward passage oi' the cold from the cakes of dry ice.'I'he multi-ply newsprint paper wrapping I1 serves as an eil'ective heatinsulator and also contines the sublimed carbon dioxide gas within thepackage and in proximity to the' carton II and wholly around the cartonI6.

It will be understood that by using the ioregoing carton and method ofpacking that preformed dry ice cakes oi a determined size may beutilized and that such cakes will serv'e to reirigerate the carton ofrefrigeratable commodity for a determined period of time. The quantityof dry ice may be materially diminished with respect to that used withpresent practice and iurthermore the commodity will be kept in bettercondition.

What I claim is:

1. A carbon dioxide ice carton for a reirigeratable material adapted forinsertion in an outer customer carton comprising an outer multiply paperWrapping, means aiIording a recess adapted for the reception of a carbondioxide ice cake for disposition at each side of refrigeratable materialwith the carbon dioxide ice in contact with the carton containing suchmaterial, said means having passages for delivering sublimed gasesoutwardly to the interior of the aforesaid multi-ply wrapping, saidmeans also having heat insulating end portions to hinder the directoutward transfer of cold from the carbon dioxide ice cakes to the endsof the package through the wrapper.

2. A carbon dioxide ice carton for dry icing a commercial carton oireirigeratable material, comprising an outer customer carton, an innermulti-ply newsprint mapping around the commercial carton and dening agas retaining space therebetween, a pair of carbon dioxide ice cakecontaining assemblages, each comprising a cor rugated paper boardelement recessed to receive a carbon dioxide ice cake with asupplementary corrugated paper element to heat insulate the carbondioxide ice cake received in the rst mentioned element at the outer iaceof the cake, the interstices of the corrugations of the first mentionedelement conducting sublimed gases from the carbon dioxide ice cakeoutwardly to the space within the multi-ply paper wrapping for thepurpose described.

` REUBEN HILL.

